{"title":"SparkFun Buck Regulator Breakout - 1.8V (AP3429A)","handle":"sparkfun-buck-regulator-breakout-1-8v-ap3429a","url":"/products/sparkfun-buck-regulator-breakout-1-8v-ap3429a","description":"The SparkFun 1.8V Buck Regulator Breakout features the AP3429A step-down DC-DC converter, providing a regulated 1.8V output at up to 2A continuous current from a 2.7V to 5.5V input. An enable pin allows the output to be switched on and off programmatically.\n\nThe 1\" × 1\" board offers multiple power connection options: a pre-assembled screw terminal, PTH pins for permanent installation, and plated slots for a DC barrel jack input. A red LED indicates when power output is enabled, and a copper pad on the bottom accommodates a heat sink.\n\nKey Features\n\n\n1.8V Regulated Output – 2A continuous from the AP3429A\n\nEnable Pin – Software-controlled output switching\n\nMultiple Input Options – Screw terminal, PTH pins, or barrel jack\n\nPower LED – Red indicator when output is active\n\nHeat Sink Pad – 0.5\" × 0.6\" copper pad on bottom\n\nMounting Holes – 4× 4-40 compatible\n\n\nSpecifications\n\n\nIC – AP3429A (Diodes Inc.)\n\nInput Voltage – 2.7V to 5.5V\n\nOutput Voltage – 1.8V regulated\n\nOutput Current – 2A continuous\n\nQuiescent Current – 90µA (no load)\n\nSwitching Frequency – 1MHz\n\nProtection – UVLO, input overvoltage, cycle-by-cycle current limit, thermal shutdown (160°C)\n\nBoard Size – 1\" × 1\" (25.4 × 25.4mm)\n\n\nPin Connections\n\n\nVIN – Power input (2.7–5.5V)\n\nGND – Common ground\n\nVOUT – Regulated 1.8V output\n\nEN – Enable (pull high to enable output)\n\n\nResources\n\nHookup Guide\nSchematic (PDF)\nAP3429A Datasheet (PDF)\nGitHub Hardware Repo\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1646,"title":"Default Title","sku":"SF-COM-21338","price":14.32,"on_sale":false,"in_stock":true,"available_quantity":84,"option1":"Default Title"}]}